Packing-ring for piston-rods.



C. R. BRYANT.

PACKING RING FOR PISTON RODS.

APPLICATION FILED OCT. 26, I914.

1 1 52 002. Patented Aug. 31, 1915.

2 SHEETSSHEET l.

wi/weoow C; R. BRYANI.

PACKING RING FOR PISTON RODS.

APPLICATION FILED OCT. 26. 1914.

Patented Aug. 31, 1915.

2 SHEETSSHEE12.

CLARANCE ROSS BRYANT, OF FORT WORTH. TEXAS, ASSIGNOR TO ROBERT W.

COLGLAZIER, 0F FORT WORTH, -TEXAS.

Specification of Letters Patent.

raeemee Aug. er, 1e15,

Application filed October 26, 1914. Serial No. 868,572.

To all whom at may concern Be it known that I, CLARANOE R. BRYANT,

a' citizen of the United. States, residing at Forth Worth, in the countyof Tarrant and State of Texas, have invented certain new and usefulImprovements in Packing- Rings for Piston-Rods, of which the followingis a specification. I

y invention relates to piston packing for steam or internal combustionengine pistons, and the object is to provide perfect packing expansiblerings for pistons so that there can be no leaking of steam or explosiveforce past the pistons and to provide a continuous packing surface onthe exterior surface of the packing ring, that is, between the packingring and the piston cylinder, and also on both sides of the packingring, top and bottom, between the edges of the packing ring and thewalls of the groove in the piston so that there is a double checkagainst the passage of steam or other element and to provide packingrings in which there will be automatic expansion ofthe O t her objectsand advantages will be fully explained in the following description andthe invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of thisapplication.

Figure 1 is a plan view of the complete packing ring. Fig. 2 is a planview of the exterior packing ring, showing by dotted outline theposition of the interior groove. Fig. 3 is a plan view of the interiorpacking ring, showing the exterior rib. Fig. 4 is a section, takenthrough the groove of the exterior packing ring. Fig. 5 is an edge viewof the complete packing ring. F1g. 6 is a section taken along the linew-ac of Fig. 1. Fig. 7 is a broken section of a pmton, showing a sectionof the packing r ng applied thereto, the section of the packing ringbeing taken on the lme of Fig 1. Fig. 8 is a plan view of an exteriorpacking ring in section through the interior groove thereof, similar toFig. 4, but showing a variation in the interior groove. Fig 9 1s across-section of a packing ring showm a variation of the exterior rib ofthe interlor .1 ring. Fig. 10 is a similar section,

showing another variation of the rib. Fig. 11 1s a perspective view ofthe packing ring shown in Fig. 1.

Similar characters of reference are used to indicate the same partsthroughout the several views.

The packing ring herein shown comprises two eccentric rmgs 1 and 2which, when placed together in operative position, form a perfectconcentric packing ring. The ex--- terior ring 1 is thicker at 3 than itis at 4 and the interior "packing ring 2 is thicker at 5 than it is at6. The exterior packing ring 1 has an interior groove 7 which commencessubstantially at the points 8, commencing at the interior surface andbecoming gradually deeper until the groove extends entirely through thering 1 at the points 9. The interior ring 2 has an exteri'or rib 10which occupies the groove 7 of the exterior ring 1 when the rings areplaced in operative position. The rib 10 commences substantially at thepoints 11 and becomes thicker until the rib passes entirely through theexterior ring 1 at the points 9. The rings 1 and 2 are open rings toprovide for expansion and the openings in the rings are placedpreferably diagonally opposite each other. At the point where the ring 1is open, the rib 10 of the interior ring formsa continuous peripheralsurface for bearing against the piston cylinder and the ring 2 is notdivided at thls point. At the point where the ring 2 is divided the ring1 is not divided. There is thus a continuous peripheral surface forbearing against the piston cylinder and continuous edge surfaces of thepacking ring to bear against both the top 12 and bottom walls 13 of thegroove in the piston.

A perfect check is formed by the two members of the packing ring, bothon the periphery and on the edges of the packing ring."

The ring above described may be the preferred form of packing, but it isap arent that variations may be made without eparting from my invention.The groove in the exterior member may be uniform in depth around theentire member, as the groove 14: shown in Fig. 8, of the drawings. Theouter edge of the rib of the interior packing member may be rectangular,as shown in Figs. 7 and 11, or curved, as shown in Fig.9, or

V-shaped as shown in Fig. 10. Various changes may be made in thedimensions also in thickness and Width of the rings.

The advantage of making the members 1 and 2 eccentric is that the thinportion of one member is placed opposite the thick portion of the otherand the pressure in the piston cylinder is thus equalized, the expansionof one packing member equalizing the expansion of the other packingmember..

In order to prevent the possible peripheral movement of one packingmember on the other, a dowel pin 15 may be inserted in the outer member1 tov project in the opening of the interior member 2. Lateral movementof the packing members is prevented by the rib of the interior memberprojecting into the groove of the exterior member.

What I claim, is, V

1. A packing ring comprising exterior and interior eccentric openpacking mem bers, the interior packing member having an exterior rib onthe thicker portion tapering and disappearing near the openingin saidmember and brldging the opening in the exterior member and said exteriormember having a groove commencing near the thicker portion and growingdeeper toward the opening therein and extendin therethrough near theopening and sai groove receiving the rib of the interior member.

2. A packing ring composed of exterior and interior packing members, theexterior member being eccentric and open and having the thicker portionthereof opposite the opening therein and an interior groove thereincommencing near the thicker 01''- tion and becoming deeper until it proects through the outer surface thereof, and the interior member beingopen and eccentric and having a rib filling said groove and projectingthrough the exterior member and bridging the opening in said exteriormemher and forming a continuous peripheral packing surface With saidexterior packing member.

In testimony whereof, I set my hand in the presence of two witnesses,this 19th day of October, 1914:.

' a CLARANCE ROSS BRYANT.

Witnesses:

- A. L. JAcxsoN, J. W. Sm.

